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    • 6. 发明授权
    • Vibration wave detecting method and vibration wave detector
    • 振动波检测方法和振动波检测器
    • US06223601B1
    • 2001-05-01
    • US09316833
    • 1999-05-21
    • Muneo HaradaNaoki Ikeuchi
    • Muneo HaradaNaoki Ikeuchi
    • G01H1100
    • G01H1/14G01H11/06
    • A vibration wave detector in which: a plurality of resonator beams, each having a different length and being allowed to resonate at a specific frequency, are provided; a piezoresistor is installed in each resonator beam; and the piezoresistors are parallel-connected so that vibration is converted to an electric signal by the piezoresistors so as to output the sum of vibration waveforms at the respective resonator beams. Utilizing the fact that the magnitude of strain is different depending on positions on the resonator beam, the installation position of the piezoresistor is adjusted on each of the resonator beams so as to set the level of an output signal from each frequency band at a desired level; thus, it becomes possible to control the gain of a specific frequency band.
    • 一种振动波检测器,其特征在于:提供多个具有不同长度并被允许以特定频率谐振的谐振器束; 每个谐振器梁中安装一个压敏电阻; 并且压电电阻器并联连接,从而通过压阻电阻器将振动转换成电信号,以输出各个谐振器波束的振动波形之和。 利用根据谐振器梁上的位置的应变幅度不同的事实,在每个谐振器波束上调整压敏电阻的安装位置,以便将来自每个频带的输出信号的电平设定在所需的电平 ; 因此,可以控制特定频带的增益。